<hibernate-mapping>

   <class name="eg.Parent" table="parent">
      <id name="pid" type="int" unsaved-value="null" >
         <column name="pid" sql-type="int" not-null="true"/>
      </id>
      <property name="name">
         <column name="NAME" sql-type="varchar(10)" not-null="true"/>
      </property>
      <!-- cause duplicate import: Parent
      <set name="children" inverse="true" lazy="true">
         <key column="parent_pid"/>
         <one-to-many class="eq.Child"/>
      </set>
      -->
   </class>

   <class name="eg.Child" table="child">
      <id name="cid" type="int" unsaved-value="null" >
         <column name="cid" sql-type="int" not-null="true"/>
      </id>
      <property name="name">
         <column name="NAME" sql-type="varchar(10)" not-null="true"/>
      </property>
      <many-to-one name="parent" column="parent_pid" class="eg.Parent"/>
   </class>   

</hibernate-mapping>

public class Child {
    private int cid;
    private String name;
    private Parent parent;
    private int parent_pid;
    // get/set method here ...
}

public class Parent {
    private int pid;
    private String name;
    private Set children;
    // get/set method here ...
}